Patents by Inventor Behzad Moslehi
Behzad Moslehi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9110259Abstract: A plurality of AWG filters with aliasing responses are selected such that the wavelength range of a fundamental response of the AWG filters results in the aliased range of AWG filters to be adjacent to a fundamental range of the AWG filters. A plurality of optical sources is provided sufficient to cover each fundamental wavelength range and each alias wavelength range of the AWG filters. When a single one of the optical sources is enabled, reflected optical energy from a series string of FBGs coupled to the optical source is applied to the plurality of AWG filters, and the AWG output in combination with the wavelength range of the optical source is used to discriminate reflected wavelength from the FBG sensors.Type: GrantFiled: February 6, 2015Date of Patent: August 18, 2015Assignee: Intelligent Fiber Optic Systems, Inc.Inventors: Richard J. Black, Joannes M. Costa, Behzad Moslehi, Vahid Sotoudeh, Jay A. Chesavage
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Publication number: 20150190123Abstract: A biopsy needle has a central axis and includes one or more sensing regions, each sensing region formed by a plurality of sensing optical fibers located over a particular extent of said central axis and inside the outer shell of the needle. The sensing optical fibers are coupled to a wavelength interrogator. A steerable catheter has a central axis and outer shell, the outer shell coupled to a plurality of optical fibers in sensing regions and actuation regions, the sensing regions formed over particular extents of the central axis by bonding gratings to the inner surface of the outer shell, and the actuation regions formed by coupling optical energy into shape memory alloys bonded to the outer shell.Type: ApplicationFiled: January 3, 2014Publication date: July 9, 2015Applicant: INTELLIGENT FIBER OPTIC SYSTEMS, INC.Inventors: Yong-Lae PARK, Richard James BLACK, Behzad MOSLEHI, Mark R. CUTCOSKY, Santhi Elayaperumal, Bruce DANIEL, Alan YEUNG, Vahid SOTOUDEH
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Patent number: 8983250Abstract: A wavelength interrogator is coupled to a circulator which couples optical energy from a broadband source to an optical fiber having a plurality of sensors, each sensor reflecting optical energy at a unique wavelength and directing the reflected optical energy to an AWG. The AWG has a detector coupled to each output, and the reflected optical energy from each grating is coupled to the skirt edge response of the AWG such that the adjacent channel responses form a complementary pair response. The complementary pair response is used to convert an AWG skirt response to a wavelength.Type: GrantFiled: March 14, 2013Date of Patent: March 17, 2015Assignee: Intelligent Fiber Optic Systems, Inc.Inventors: Richard J. Black, Joannes M. Costa, Fereydoun Faridian, Behzad Moslehi, Vahid Sotoudeh
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Publication number: 20140268099Abstract: A movement and expression sensor has a plurality of fiber Bragg gratings (FBG) disposed along the length of an optical fiber, and the optical fiber is placed in contact with a subject's skin surface. The sensors are interrogated for reflected wavelength, which is converted into a temperature or a strain. A series of such measurements can be made to determine the movement or position of the sensor location. A garment may be formed using the sensors and an elastomeric material, such that the sensors may be worn and removed, and the movements of the elastomer in the areas of sensors measured as a wavelength shift to characterize movement or estimate location. The elastomeric garment may be formed as a mask, or a sock, such as for use with a face, or foot.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: Intelligent Fiber Optic Systems, Inc.Inventor: Behzad Moslehi
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Patent number: 8659422Abstract: A sensor module includes a number of environment sensors and condition sensor interfaces. Each condition sensor interface is configured to couple with a condition sensor capable of sensing an attribute of a component exposed to the environment. The sensor module may be embedded within a structure associated with the component. For example, in the context of a solid rocket motor, the sensor module may be embedded within the exhaust plug.Type: GrantFiled: July 23, 2009Date of Patent: February 25, 2014Assignee: Raytheon CompanyInventors: Terry A. Tracy, Behzad Moslehi, Gregory A. Ruderman
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Patent number: 8649847Abstract: A biopsy needle has a central axis and includes one or more sensing regions, each sensing region formed by a plurality of sensing optical fibers located over a particular extent of said central axis and inside the outer shell of the needle. The sensing optical fibers are coupled to a wavelength interrogator. A steerable catheter has a central axis and outer shell, the outer shell coupled to a plurality of optical fibers in sensing regions and actuation regions, the sensing regions formed over particular extents of the central axis by bonding gratings to the inner surface of the outer shell, and the actuation regions formed by coupling optical energy into shape memory alloys bonded to the outer shell.Type: GrantFiled: September 18, 2009Date of Patent: February 11, 2014Assignee: Intelligent Fiber Optic Systems, Inc.Inventors: Yong-Lae Park, Richard James Black, Behzad Moslehi, Mark R. Cutkosky, Santhi Elayaperumal, Bruce Daniel, Alan Yeung, Vahid Sotoudeh
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Patent number: 8571409Abstract: An optical ring network for fixed length messages from a plurality of nodes for transmission to different nodes uses a plurality of wavelengths for transmission, and messages for transmission are ordered and arranged on a per-wavelength basis to minimize a transmit finish time. Each node may be operated in an ADM (add drop multiplexer) mode where an optical node removes information on a particular wavelength and adds information on the same particular wavelength, or each node may be operated in a CDC (colorless, directionless, contentionless) mode where information is assigned to a wavelength according to a selection algorithm which may place it on any wavelength without regard to an original node wavelength. The selection algorithm optimizes selection of messages and wavelengths for transmit finish time.Type: GrantFiled: November 11, 2011Date of Patent: October 29, 2013Assignee: Intelligent Fiber Optic Systems, Inc.Inventors: Rui Wang, Behzad Moslehi, Richard J. Black
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Patent number: 8402834Abstract: A temperature correcting pressure gauge which has a substrate having at least one surface coupled to a source of pressure to be measured, the substrate first surface having a first fiber Bragg grating from a first optical fiber attached in an appropriately sensitive region of the substrate, a fiber Bragg grating from a second optical fiber attached to the opposite surface from the first fiber Bragg grating, the first and second fiber Bragg gratings reflecting or transmitting optical energy of decreasing or increasing wavelength, respectively, in response to an applied pressure. The first and second fiber Bragg gratings have nominal operating wavelength ranges that are adjacent to each other but are exclusive ranges and the fiber Bragg gratings also have closely matched pressure coefficients and temperature coefficients.Type: GrantFiled: February 12, 2010Date of Patent: March 26, 2013Assignee: Intelligent Fiber Optic Systems, Inc.Inventors: Behzad Moslehi, Joannes M. Costa
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Patent number: 8257991Abstract: A sensor for force is formed from an elastomeric cylinder having a region with apertures. The apertures have passageways formed between them, and an optical fiber is introduced into these passageways, where the optical fiber has a grating for measurement of tension positioned in the passageways between apertures. Optionally, a temperature measurement sensor is placed in or around the elastomer for temperature correction, and if required, a copper film may be deposited in the elastomer for reduced sensitivity to spot temperature variations in the elastomer near the sensors.Type: GrantFiled: March 7, 2011Date of Patent: September 4, 2012Assignee: Intelligent Fiber Optic Systems, Inc.Inventors: Yong-Lae Park, Behzad Moslehi, Richard James Black, Mark R. Cutkosky, Kelvin K. Chau
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Patent number: 8165469Abstract: An optical add drop multiplexer (OADM) for use in a sensing system has the OADMs arranged either in a cascade or in a ring, with each OADM accepting a source input and generating a source output, and accepting a signal input and generating a signal output, where the source input includes a broadband optical source for use in providing optical power to a plurality of sensor gratings arranged in a series string, each sensor grating responsive to a physical parameter at a unique wavelength. The series string of sensors is excited by optical power coupled from the broadband source port, and returns optical signal response to a sensor port of the OADM, which optical energy is added to optical energy at the signal input port to form the signal output port. In another embodiment for a ring topology, the source ports and signal ports include a clockwise and counterclockwise set of source and sensor signals, and the sensor signals for CW and CCW each include a primary and secondary signal.Type: GrantFiled: January 20, 2009Date of Patent: April 24, 2012Assignee: Intelligent Fiber Optic Systems, Inc.Inventors: Behzad Moslehi, Richard J. Black, Vahid Sotoudeh
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Patent number: 7903907Abstract: A sensor for force is formed from an elastomeric cylinder having a region with apertures. The apertures have passageways formed between them, and an optical fiber is introduced into these passageways, where the optical fiber has a grating for measurement of tension positioned in the passageways between apertures. Optionally, a temperature measurement sensor is placed in or around the elastomer for temperature correction, and if required, a copper film may be deposited in the elastomer for reduced sensitivity to spot temperature variations in the elastomer near the sensors.Type: GrantFiled: April 10, 2008Date of Patent: March 8, 2011Assignee: Intelligent Fiber Optic Systems, Inc.Inventors: Yong-Lae Park, Behzad Moslehi, Richard James Black, Mark R. Cutkosky, Kelvin K Chau
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Publication number: 20110018703Abstract: A sensor module includes a number of environment sensors and condition sensor interfaces. Each condition sensor interface is configured to couple with a condition sensor capable of sensing an attribute of a component exposed to the environment. The sensor module may be embedded within a structure associated with the component. For example, in the context of a solid rocket motor, the sensor module may be embedded within the exhaust plug.Type: ApplicationFiled: July 23, 2009Publication date: January 27, 2011Applicant: RAYTHEON COMPANYInventors: Terry A. Tracy, Behzad Moslehi, Gregory A. Ruderman
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Patent number: 7133582Abstract: A tunable optical fiber has a grating which is attached to an expander responsive to an external control including a temperature or a magnetic field. The expander changes length, and this is coupled to the optical fiber, which changes pitch, thereby accomplishing a tuning change. The expander may be coupled to the grating directly, or through an expansion reducer, which produces a greater range of tuning. Terfenol-Dâ„¢ may be used for the expander material, and tubes which include a bonding point adjacent to the extents of the grating may form the extent reducers.Type: GrantFiled: December 4, 2003Date of Patent: November 7, 2006Inventors: Behzad Moslehi, Marco A. Hernandez
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Patent number: 7127132Abstract: A fiber optic sensor system includes a plurality m of sensor segments, each sensor segment further comprising a plurality n of sensor gratings for making measurements. Each sensor grating of the sensor segment operates within a unique wavelength channel, such that a plurality m of sensor segments have m sensors in each wavelength channel, and n wavelength channels, for a total of m*n sensors. A broadband optical source is gated for a duration of time which enables all of the sensors on a sensor segment to reflect optical energy corresponding to their measurement, but not long enough to receive reflected optical energy from more than one sensor on a single wavelenghth channel. In this manner, n wavelength channels of measurement can be time-multiplexed to measure m*n sensors.Type: GrantFiled: March 8, 2004Date of Patent: October 24, 2006Assignee: IFOS, Inc.Inventors: Behzad Moslehi, Kelvin K. Chau
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Patent number: 6895132Abstract: A fiber optic sensor comprises two independent fibers having Bragg gratings which are coupled to commutating broadband optical sources through splitters and wavelength discriminators. The ratio of detected optical energy in each of two detectors examining the wave intensity returned to a wavelength discriminator coupled with the characteristic of the wavelength discriminator determines the wavelength returned by the grating. In another embodiment, tunable filters are utilized to detect minimum returned wave energy to extract a sensor wavelength Reference to the original grating wavelength indicates the application of either temperature or strain to the grating. In another embodiment, a plurality of Bragg grating sensor elements is coupled to sources and controllers wherein a dimensional change in a fiber having a Bragg grating is detected using a measurement system comprising broad-band sources, optical power splitters, a high-sensitivity wavelength discriminator, optical detectors, and a controller.Type: GrantFiled: April 24, 2003Date of Patent: May 17, 2005Assignee: IFOS, Inc.Inventors: Behzad Moslehi, Richard James Black, Herbert John Shaw, Keiichiro Toyama
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Patent number: 6788835Abstract: A fiber optic sensor comprises two independent fibers having Bragg gratings which are coupled to commutating broadband optical sources through splitters and wavelength discriminators. The ratio of detected optical energy in each of two detectors examining the wave intensity returned to a wavelength discriminator coupled with the characteristic of the wavelength discriminator determines the wavelength returned by the grating. In another embodiment, tunable filters are utilized to detect minimum returned wave energy to extract a sensor wavelength Reference to the original grating wavelength indicates the application of either temperature or strain to the grating. In another embodiment, a plurality of Bragg grating sensor elements is coupled to sources and controllers wherein a dimensional change in a fiber having a Bragg grating is detected using a measurement system comprising broad-band sources, optical power splitters, a high-sensitivity wavelength discriminator, optical detectors, and a controller.Type: GrantFiled: April 24, 2003Date of Patent: September 7, 2004Assignee: IFOS, Inc.Inventors: Behzad Moslehi, Richard James Black, Herbert John Shaw, Keiichiro Toyama
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Patent number: 6751367Abstract: A fiber optic sensor comprises two independent fibers having Bragg gratings which are coupled to commutating broadband optical sources through splitters and wavelength discriminators. The ratio of detected optical energy in each of two detectors examining the wave intensity returned to a wavelength discriminator coupled with the characteristic of the wavelength discriminator determines the wavelength returned by the grating. In another embodiment, tunable filters are utilized to detect minimum returned wave energy to extract a sensor wavelength Reference to the original grating wavelength indicates the application of either temperature or strain to the grating. In another embodiment, a plurality of Bragg grating sensor elements is coupled to sources and controllers wherein a dimensional change in a fiber having a Bragg grating is detected using a measurement system comprising broad-band sources, optical power splitters, a high-sensitivity wavelength discriminator, optical detectors, and a controller.Type: GrantFiled: April 24, 2003Date of Patent: June 15, 2004Assignee: IFOS, Inc.Inventors: Behzad Moslehi, Vahid Sotoudeh, Brian Kutner, Dario G. Falquier, Levy Oblea
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Publication number: 20040052444Abstract: A fiber optic sensor comprises two independent fibers having Bragg gratings which are coupled to commutating broadband optical sources through splitters and wavelength discriminators. The ratio of detected optical energy in each of two detectors examining the wave intensity returned to a wavelength discriminator coupled with the characteristic of the wavelength discriminator determines the wavelength returned by the grating. In another embodiment, tunable filters are utilized to detect minimum returned wave energy to extract a sensor wavelength Reference to the original grating wavelength indicates the application of either temperature or strain to the grating. In another embodiment, a plurality of Bragg grating sensor elements is coupled to sources and controllers wherein a dimensional change in a fiber having a Bragg grating is detected using a measurement system comprising broad-band sources, optical power splitters, a high-sensitivity wavelength discriminator, optical detectors, and a controller.Type: ApplicationFiled: April 24, 2003Publication date: March 18, 2004Inventors: Behzad Moslehi, Vahid Sotoudeh, Brian Kutner, Dario G. Falquier, Levy Oblea
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Publication number: 20040028310Abstract: A fiber optic sensor comprises two independent fibers having Bragg gratings which are coupled to commutating broadband optical sources through splitters and wavelength discriminators. The ratio of detected optical energy in each of two detectors examining the wave intensity returned to a wavelength discriminator coupled with the characteristic of the wavelength discriminator determines the wavelength returned by the grating. In another embodiment, tunable filters are utilized to detect minimum returned wave energy to extract a sensor wavelength Reference to the original grating wavelength indicates the application of either temperature or strain to the grating. In another embodiment, a plurality of Bragg grating sensor elements is coupled to sources and controllers wherein a dimensional change in a fiber having a Bragg grating is detected using a measurement system comprising broad-band sources, optical power splitters, a high-sensitivity wavelength discriminator, optical detectors, and a controller.Type: ApplicationFiled: April 24, 2003Publication date: February 12, 2004Inventors: Behzad Moslehi, Richard James Black, Herbert John Shaw, Keiichiro Toyama
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Publication number: 20040028311Abstract: A fiber optic sensor comprises two independent fibers having Bragg gratings which are coupled to commutating broadband optical sources through splitters and wavelength discriminators. The ratio of detected optical energy in each of two detectors examining the wave intensity returned to a wavelength discriminator coupled with the characteristic of the wavelength discriminator determines the wavelength returned by the grating. In another embodiment, tunable filters are utilized to detect minimum returned wave energy to extract a sensor wavelength Reference to the original grating wavelength indicates the application of either temperature or strain to the grating. In another embodiment, a plurality of Bragg grating sensor elements is coupled to sources and controllers wherein a dimensional change in a fiber having a Bragg grating is detected using a measurement system comprising broad-band sources, optical power splitters, a high-sensitivity wavelength discriminator, optical detectors, and a controller.Type: ApplicationFiled: April 24, 2003Publication date: February 12, 2004Inventors: Behzad Moslehi, Richard James Black, Herbert John Shaw, Keiichiro Toyama